The combined momentum of the two objects is +42 kg·m/s.
What's the momentum?To determine the combined momentum of two objects, you simply add their individual momenta together.
Given:
Object A momentum (pA) = +20 kg·m/s
Object B momentum (pB) = +22 kg·m/s
Combined momentum (p_total) = pA + pB
= 20 kg·m/s + 22 kg·m/s
= 42 kg·m/s
So, the combined momentum of the two objects is +42 kg·m/s.
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How much voltage would be necessary to generate a 10 amps in a circuit with a 5 ohms resistance.
Answer:
Voltage: 50V
Hope this helps
Answer:
50 volts
Explanation:
ohms law is V=IR so take 10 and multiply it by 5 and its 50 volts hope this helps god bless
PLEASE HELP!!! 25 pts!!
to calculate the velocity of an object the_____of the position versus time graph should be calculated.
Answer:
The slope of the graph is what you need. That tells you the speed not the velocity. In order to find the velocity you would also need to know the direction of the motion.
Answer:
Slope
Explanation:
Rise over Run
1. Car A has a mass of 8,000 Kg and is traveling at 40 miles per hour. Car B has a mass of 10,000 Kg and is traveling at 40 miles per hour. Which car has more kinetic energy?
Answer:
car B
Explanation:
K.E=1/2mv(squared)
K.E=1/2x10000x40x40
K.E=5000x1600
K.E=8000000J
convert to KJ
K.E=8000000/1000
K.E=8000KJ
According to Newton's first law of motion, what would happen to a car traveling at a constant velocity of 55 MPH to the west in the absence of an unbalanced force?
Explanation:
Newton's first law of motion says that an object will be at rest or it will be in motion until an unbalanced force acts on it.In this case, a car traveling at a constant velocity of 55 mph to the west in the absence of an unbalanced force.It would mean that the car will continue to move with a constant velocity of 55 mph to the west due to Newton's first law of motion.Which of the following would cause the force of kinetic friction to increase?
O
A. An increase in the normal force
O
B. A decrease in the normal force
O
C. A decrease in Hy
O
D. An increase in us
Answer: an increase in the normal force
Explanation:
Option A : An increase in the normal force
Experimental results have been presented showing that when an elastically soft material slides on a smooth surface, the coefficient of sliding friction increases with speed over a wide range of sliding velocities.
Slip friction is defined as the force acting between moving surfaces. An object moving on the surface receives a force opposite to its direction of motion. The magnitude of the force depends on the coefficient of dynamic friction between the two materials.
Is dynamic friction the same as frictional force?Even if two surfaces pass each other, there may be frictional force between the surfaces, and this sliding friction is called dynamic friction.
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Which represents potential energy?
A) bread baking
B) lawnmower cutting grass
C) car racing downhill
D) weed whacker full of gas
Answer:
D) Weed whacker full of grass
Explanation: Its D) because the weed wacker full of grass is stil and not moving therefore making it potential energy.
Controlling voluntary skeletal muscles is a function of the __________ nervous system.
A.
sympathetic
B.
somatic
C.
autonomic
D.
central
Please select the best answer from the choices provided
A
B
C
D
Answer:
Your answer is SOMATIC :)
The somatic nervous system is the part of the peripheral nervous system associated with the voluntary control of body movements and skeletal muscles.
The voluntary skeletal muscles that should be controlled represent the function of the somatic nervous system.
What is the somatic nervous system?The somatic nervous system refers to the system where it is the portion of the nervous system i.e. peripheral and should be associated with the controlling of the movement of the bonds through the skeletal muscles usage. Therefore, we can say that the option b is correct.
And, the rest of the options are wrong.
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When two ions with the same charge come together, their electric fields will
A. bend towards each other
B. bend away from each other
C. nothing will happen
Answer:
B. Bend away from each other
Explanation:
The velocity of an object is the _____ of the object
A. Speed
B. Acceleration
C. Momentum and weight
D. Speed and direction
what are mechanical waves?
Answer:
A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission—the material—is limited. Therefore, the oscillating material does not move far from its initial equilibrium position.
Explanation:
Which of the following is not a practical application of gravity?
O
A. It keeps the moon in orbit around Earth.
O
B. The moon has no gravity because it has no atmosphere.
O
C. It keeps the galaxies from flying apart.
O
D. It keeps Earth in orbit around the sun.
The option which is not practical application of gravity is The moon has no gravity because it has no atmosphere. The correct option is option B.
Practical application of gravityPractical Application of gravity is the use of gravity in ways that beneficial to man and earth. Gravity is one of the most important physical features of the earth and major contribution to our existence.
Examples of practical application of gravity
Gravity keeps the Earth orbiting around the Sun.Gravity keeps people on the Earth's surfaceGravity holds the feet down.Gravity holds the air down.Learn more about importance of gravity here
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WILL GIVE BRAINLIEST AND 30 POINTS!
What is the magnitude of a nanometer?
10–3 m
10–6 m
10–9 m
10–12 m
The magnitude would be 10-9m
Based on scientific information and records, the magnitude of a nanometer is equal to: C. 10⁻⁹ m.
What is measurement?Measurement refers to a process through which the size, magnitude or other physical quantities associated with an object is taken, especially for the purpose of a scientific research (experiment).
What is a nanometer?In the metric system, a nanometer can be defined as a measure of length such as:
Wavelengths of light.Distances between atoms of a molecule.In conclusion, a nanometer is one billionth (10⁻⁹ m) of a meter.
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Which object would require the most amount of energy, or force, to set it into motion?
A. a school bus
B. a refrigerator
C. a microwave
D. a houseplant
Answer:
The answer is A
Explanation:
The school bus has the most mass so it would need the most energy and force to set it into motion
hope this helps ;)
A. a school bus is the object that would require the most amount of energy, or force, to set it into motion.
Force is equal to mass multiplied by acceleration. A refrigerator, a microwave, and a houseplant can be moved easily from one place to another using wheels to displace an object from one place to another. But the mass of a school bus is more than any of the options given if even it runs on wheels a more force is required to be used to set the school bus in motion.Hence, A. school bus is the correct option.
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A pendulum completes 30 cycles every minute. What is the frequency of the pendulum?
For this case we have that by definition, the frequency is given by the number of cycles that are formed in a second.
According to the statement we have:
Cycles: 30
Time: 1 minute = 60 seconds
Thus, the frequency is:
[tex]f = \frac {30} {60} = \frac {3} {6} = \frac {1} {2} = 0.5[/tex]
Thus, the frequency of the pendulum is[tex]0.5 \ Hz[/tex]
Answer:
[tex]0.5 \ Hz[/tex]
List at least five examples of minerals and their common uses.
Answer:
Gold
mica
halite
gypsum
copper
Explanation:
Gold:it is used in dentistry
mica: its is used in putting sparkle in rock
halite:its used in seasoning food and softening water
gypsum: it is used as fertilizer and road construction
copper: it is used for jewelry and currency
Which graph above shows the highest pitch?
Answer:
Graph 3
Explanation:
when a wave has a higher pitch, that means it has a higher frequency. Frequency is the number of crests that happen in a certain amount of time and as you can see number 3 has the most crests in that amount of time so its frequency is greater so its pitch is higher
As the ice melts into liquid water, what happens to the kinetic energy of the particles in the sample?
Answer:
it goes down
Explanation:
Answer:
The kinetic energy of the particles are being reduced.
In multicellular organisms, which choice ranks the level of organization from simplest to increasingly more complex?
A.
cells, tissues, organ systems, organs
B.
organs, cells, tissues, organ systems
C.
cells, tissues, organs, organ systems
D.
organs, tissues, organ systems, cells
Answer:
The answer is C.
Explanation:
Cells are the smallest organisms and makes up all living thing or being. The tissues are made of cells. The organs are made of tissues. The organ systems are made of organs. Therefore the order is C. cells, tissues, organs, and organ systems.
Based on the principles of convection, conduction and thermal radiation, which scenario below is most similar to the following situation?
You put a heating pad on your back after exercising.
A) Feeling a metal wire get warmer as you roast a marshmallow over a fire.
B) Warm air rising in a room where the air is moving.
C) The sun warming up the roof on a house.
D) Cold water sinking in a pot of water being warmed up
The total thermal energy needed to raise the temperature of this ice cube to 0.0 °C and completely melt the ice cube is 5848 J
specific latent heat of fusion of ice = 334 000 J/kg
Calculate the mass of the ice cube.
Answer:
0.018kg
Explanation:
Q=mlf
m=?,Lf=334000J/kg,Q=5848J
5848=mx334000
5848=334000m
divide both sides by 334000
334000m/334000=5848/334000
m=0.018kg
Can you plz answer it!!
On the electromagnetic spectrum, visible light is positioned between
A. radio and infrared
B. infrared and ultraviolet
C. microwaves and ultraviolet
D. x- rays and gamma rays
Answer:
B
Explanation:
On the electromagnetic spectrum, visible light is positioned between infrared and ultraviolet. Hence, option (B) is correct.
What is electromagnetic spectrum?The electromagnetic spectrum is a range of frequencies, wavelengths, and photon energies that includes wavelengths that range from a few kilometers to a small portion of the size of an atomic nucleus in the spectrum of electromagnetic waves.
Frequencies in this range range from below 1 hertz to above 1025 Hz. In a vacuum, electromagnetic waves typically move at speeds close to those of light. They operate at a variety of wavelengths, frequencies, and photon intensities, though.
The electromagnetic spectrum is made up of a range of all electromagnetic radiation and a number of subranges, or "portions," that fall within that range. These can also be categorized as ultraviolet, visible, or infrared radiation.
In the electromagnetic spectrum, visible light lies between infrared and ultraviolet radiation. Its wavelength ranges from 380 nanometers to 740 nanometers, and its frequencies range from 4 10¹⁴ Hz to 8 × 10¹⁴ hertz (Hz).
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Directions: Select ALL the correct answers.
Friction is a force that can oppose the motion of two objects that are touching each other. Which of the following are examples of friction?
A. A nail holds two wooden boards together.
B. A parachute softens the landing of a skydiver.
C. A space probe orbits the Moon.
D. The brakes on a bike rub against the wheel.
The current through a device is 0.30 A, and the resistance in the device is 20 many 1.5 V batteries are required to run the device?
Explanation:
V=IR
V=0.3x20
V=6
thus to find the number of 1.5v batteries you divide 6 by 1.5
6÷1.5=4
thus four 1.5v batteries are needed
when will magnets start moving up or down
Answer:
When there is an opposite to attract to it in the up area.
Explanation:
A watershed is
a. A building that is close to a water
source.
b. An area where water drains into one
location such as a lake, river or ocean
C. Water that flows over the land surface
from rain, snowmelt, or other sources
d. None of the above
Answer:
B
Explanation:
blank is the transfer of thermal energy by collisions between particles
The complete statement is -
Conduction is the transfer of thermal energy by collisions between particles.
What is thermal energy?Thermal energy is the energy that is due to the temperature of the body. The molecules, atoms and ions are in constant motion. When the body is heated, the particles start to move fast enough and collide with the walls. Due to this the temperature of the body rises.
Given is the transfer of thermal energy by collisions between particles.
Conduction takes place more fastly in solids and liquids. This is due to the fact that the particles are a lot closer in them as compared to the gases where the particles are far enough. Therefore, we can complete the blank as follows -
Conduction is the transfer of thermal energy by collisions between particles.
Therefore, the complete statement is -
Conduction is the transfer of thermal energy by collisions between particles.
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What kind of wave is this?
Answer:
I think its transverse
Explanation:
two +1C charges are separated by 3000m. What is the magnitude of the electric force between them?
Answer:
1000 N
Explanation:
The Electric Force between two charged particles with charges q1 and q2 respectively, separated by a distance, d, is given as:
F = (k * q1 * q2) / d²
Where k = Coulombs constant
From the question:
Charge of first particle = charge of second particle = q = +1 C
Distance between both particles, d = 3000 m
Therefore, Electric Force is:
F = (9 * 10^9 * 1 * 1) / (3000²)
F = (9 * 10^9) / (9 * 10^6)
F = 1 * 10^3 N = 1000 N
The electric force between both charges is 1000 N.
Answer:
1000 N
Explanation:
The electric force between two charges is given as
F = kq'q/r²......................... Equation 1
Where F = electric force between the charges, q' = magnitude of the first charge, q = magnitude of the second charge, r = distance between the charges, k = coulombs constant
Given: q' = q = 1 C, r = 3000 m, k = 9×10⁹ Nm²/kg²
Substitute into equation 2
F = 1²×(9×10⁹)/3000²
F = 1000 N.
Hence the magnitude of the electric force between them = 1000 N
When two waves having displacements in opposite directions meet, _______________ occurs.
A, complete cancellation
B, destructive interference
c, constructive interference
D, no interference
Answer: D
Explanation:
Answer:
the answer is b
Explanation:
when there going against each other it would have to break, I hope this helps.
What statement is NOT true about fossils?
a.Fossils give us clues about past climate
b.Fossils give us clues about the ground they are formed in
c.Fossils give us clues about surface changes
d.Fossils give us clues about changes in organisms over time
The statement that is not true about fossils is that they give us clues about the ground they are formed in. Option b
Among the given options, the statement that is NOT true about fossils is that fossils give us clues about the ground they are formed in. Fossils indeed give us valuable information about past climates, geological surface changes, and the evolutionary changes in organisms over time. However, the composition or characteristics of the ground in which they're formed isn't typically information that fossils can provide.
Fossils serve as a rich source of data for paleontologists and geologists, often providing insights into major geological events and the past climates on Earth. The fossil record, which consists of all the fossils found on Earth, maps out how life forms have changed over the millennia and reflects the history of life on our planet. Option b